Update app.py

app.py

@@ -179,14 +179,14 @@ model: https://huggingface.co/DionTimmer/controlnet_qrcode-control_v1p_sd15
             ):
                 width = gr.Slider(
                     minimum=64,
-                    maximum=2048,
+                    maximum=4096,
                     step=64,
                     value=768,
                     label="Width",
                 )
                 height = gr.Slider(
                     minimum=64,
-                    maximum=2048,
+                    maximum=4096,
                     step=64,
                     value=768,
                     label="Height",